JPH05322272A - Air conditioner - Google Patents

Abstract

PURPOSE:To obtain an air conditioner, operated so as to detect a floor surface temperature inexpensively with excellent accuracy and keep the temperature in a room in comfortable condition. CONSTITUTION:In an air conditioner, in which warm air, sucked by a fan 3 through a suction port 4 formed on the body of an indoor unit accommodating the fan 3 and a heat exchanger 2 therein and whose heat is exchanged in the heat exchanger 2, is conducted to flow toward the center of a floor surface and heat the same when a floor surface temperature is low, then, the warm air is distributed so as to flow in parallel to a ceiling surface and wall surfaces when the floor surface temperature is risen thereby reducing the feeling of airflow against a human body, the degree of temperature rise per unit time is monitored by a floor surface temperature detector 7, detecting the temperature of the floor surface. When the value of temperature rise is higher than a set value, the air is conducted so as to flow toward the center of the floor surface and when the same value is lower than the set value, the air is conducted so as to flow in parallel to the ceiling surface and the wall surfaces whereby the feeling of airflow against a human body is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly to an air conditioner capable of determining a floor surface temperature and blowing an appropriate warm air.

[0002]

2. Description of the Related Art FIGS. 8 to 15 show, for example, Japanese Patent Publication 61-54.
8 is a front view of a conventional example, FIG. 9 is a sectional view of the conventional example, FIG. 10 is a partially cutaway view of the conventional example, and FIG. 11 is a diagram. 10 is a cross-sectional view taken along the line XX ', FIG. 12 is a state diagram of the blowing air of the conventional example, FIG. 13 is an explanatory diagram showing the flow of the blowing air of the conventional example, and FIG. 14 is an explanatory diagram showing the flow of the blowing air of the conventional example. FIG. 15 is a flowchart of the wind direction control means of the conventional example.

In the figure, reference numeral 21 denotes a main body of an indoor unit having a heat exchanger 22 and a blower 23 housed therein, and 24 is formed on an upper portion of a front panel of the main body 21 of the indoor unit so as to face the heat exchanger 22. The suction inlet 25 is a lower outlet for blowing out the air that has been sucked from the inlet 24 by the blower 23 and is heat-exchanged by the heat exchanger 22, and is attached to the bottom panel of the main body 21 of the indoor unit. Has been formed. Reference numeral 26 is a horizontal air outlet for sucking air from the suction port 24 by the blower 23, heat-exchanged by the heat exchanger 22, and blowing out the air in the horizontal direction. The horizontal air outlet 26 is formed at the lower part of the front panel of the main body 21 of the indoor unit. There is. Reference numeral 27 denotes an outlet wind guide wall provided between the lower outlet 25 and the horizontal outlet 26, which has a cross-section with a lower wall extending downward and a horizontal wall extending horizontally. is doing.

28 is an air volume control plate mounted on a horizontal shaft 29 pivotally supported along the blow-out guide wall 27, 30 is a step motor for rotating the horizontal shaft 29, and 31 and 32 are the step motors. First and second limit switches for detecting the rotational position of the air volume control plate 28 and reversing the forward / reverse rotation of the step motor 30 for regulating the rotational range of the air volume control plate 28. Is.

Next, the operation will be described. First, when the power switch is turned on, the heat exchanger 22 and the blower 23 are operated, the air in the room is sucked in from the suction port 24 by the blower 23, and the air heat-exchanged by the heat exchanger 22 is blown into the lower outlet 25 and the horizontal direction. The air is blown out from the air outlet 26 in the downward and horizontal directions according to the distribution ratio according to the state of the air volume control plate 28.

On the other hand, at the same time when the power switch is turned on, the air volume control plate 23 is also moved by the step motor 30 to the horizontal shaft 2
9 through the first and second limit switches 31, 32
Can be rotated between. By the rotation of the air volume control plate 28, the air volume blown out from the lower air outlet 25 and the horizontal air outlet 26 is changed with the passage of time. This state is shown in FIG.
Shown in.

In FIG. 12, the dotted line a indicates the amount of air blown out from the lower air outlet 25, the solid line b indicates the amount of air blown out of the horizontal air outlet 26, and the chain line d indicates the total amount of air blown out from both air outlets 25 and 26. The solid line d indicates the blowing air volume. Then, at time T1 in FIG. 12, the airflow state in the room becomes the state shown in FIG. In this case, the high temperature air flow does not stay near the ceiling 33a, and the amount of heat flowing out to the outside is small. Further, since the horizontal blowing air 34 stirs the indoor air, the indoor temperature distribution is unlikely to deteriorate.

On the other hand, at time T2 in FIG. 12, the airflow in the room is as shown in FIG. In this case, since the lower blown air 35 reaches the floor 33b sufficiently, the effect of stirring the indoor air is large and the indoor temperature distribution becomes good. Further, due to the influence of the horizontal blowing air 34, the stirring is performed in the vicinity 36 of the ceiling and does not stay.

[0009]

Since the conventional air conditioner is constructed as described above, the distribution ratio is constantly changed to the horizontal blow-out and the lower blow-out at regular intervals, especially during heating. Therefore, because the unit is installed at a high position or the air volume decreases due to dust clogging at the air inlet, it is difficult for warm air to reach the floor surface and sufficient heat does not reach, so the temperature of the floor surface is very low. There was a problem that it was easy to feel the cold without climbing. As a means for solving this, a floor temperature detector detects the floor temperature at P1 as shown in FIG.
It is conceivable that a method of discriminating the position of the wind direction plate by discriminating whether the temperature is higher or lower than the set temperature.

However, looking at the accuracy of the radiation sensor generally used as the floor temperature detector, the accuracy of the radiation sensor alone is ± 5.0.
There are variations above ℃. An example of storing this in the makeup cover of the indoor unit by design is shown in FIGS. In the figure, 37 is a makeup cover, 38 is a sensor, 39 is infrared rays, and 40 is a slit. The accuracy is ± 21.1 ° C. in FIG. 5 according to the opening area of the slit 40 provided on the decorative cover 37, and ± 13.4 ° C. even if the opening area is increased as shown in FIG. And the width of variation becomes wider. As a countermeasure, in order to improve the accuracy of the radiation sensor, selection is performed and the temperature is corrected by two radiation sensors, but this leads to an increase in cost.

In order to solve the above-mentioned problems, the present invention provides a radiation sensor, which is a floor surface temperature detector having a large variation in accuracy, with a variation in accuracy in the temperature rise value (Δ temperature / Δ time) per unit time. Has been made paying attention to the fact that it becomes smaller, and its purpose is to provide an air conditioner that detects the floor temperature inexpensively and accurately and operates so that the indoor temperature becomes a comfortable state.

[0012]

According to the present invention, in order to achieve the above object, an indoor unit main body having a blower and a heat exchanger housed therein, a suction port formed in the indoor unit main body, and the blower are provided. Is sucked in through the suction port,
Warm air that has been heat-exchanged with the heat exchanger, when the floor surface temperature is low, let the air flow to the center of the floor surface to warm the floor surface, and when the floor surface temperature rises, air is emitted parallel to the ceiling surface and wall surfaces. In an air conditioner that blows away and feels little airflow to the human body, the temperature rise rate per unit time is monitored by receiving the detection signal from the floor temperature detector that detects the temperature of the floor surface. If the temperature rise value per hour is above the set value, the air will flow to the center of the floor, and if the temperature upper value per unit time is below the set value, the air flow direction plate will be controlled so that the air will flow parallel to the ceiling and wall surfaces. The wind direction plate control means is provided.

[0013]

The wind direction plate control means in the present invention changes the temperature of the indoor floor surface by changing the air discharged by the wind direction plate according to the detection signal from the floor surface temperature detector which detects the temperature rise value per unit time. By changing the blowing direction into the room, the temperature distribution and the air flow distribution inside the room are made into desired states.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an overall configuration diagram according to an embodiment of the invention,
2 is a partial sectional view of the wind direction plate shape, FIG. 3 is a virtual view of the air flow at the position of the wind direction plate in FIG. 2, and FIG. 4 is a flow chart of the wind direction control means.

In the figure, 1 is a decorative cover of an indoor unit, 2 is a heat exchanger, 3 is a blower, 4 is an air intake port, and 5
Is a blowout port, 6 is a wind direction plate provided at the blowout port 5, 7 is a floor surface detector for detecting the radiation temperature of the floor surface provided at the bottom of the decorative cover 1, and 8 is a detection signal from the floor surface detector 7. Is a wind direction plate control means for driving the wind direction plate 6 by the wind direction plate drive motor 9. The wind direction plate control means 8 is not shown,
A microcomputer that performs arithmetic processing, an input unit that inputs a signal from the floor detector 7 to the microcomputer, and an output unit that outputs a control signal from the microcomputer to the wind direction plate driving motor 9.
It is composed of a memory for storing detection signals and various programs.

First, when the power switch is turned on, the heat exchanger 2 and the blower 3 in the decorative cover 1 of the indoor unit are activated, the blower 3 sucks the indoor air from the air suction port 4, and the heat exchanger 2 exchanges heat. The discharged air is the outlet 5
Blown out from.

FIG. 4 shows a processing flow of the operation of the wind direction plate control means 8 at this time. Start, first step S
In step 1, the room temperature set temperature is discriminated, and when it is equal to or higher than the set temperature, the process goes to step S2, and the temperature ΔTf per unit time of the floor surface temperature detector is detected in conjunction with the microcomputer, and this ΔTf is stored in step S3. Is remembered as When it is lower than the temperature rise value ΔTset per unit time, the temperature gradient per unit time is small and the floor surface temperature is stable, that is,
Since the temperature is rising, the position of the wind direction plate is confirmed in step S4, the wind direction plate 6 is brought into the state shown in FIG. 2 (b) in step S5, and the air flow is changed to the ceiling surface shown in FIG. It is possible to make the air flow 11 parallel to each other and the air flow 12 parallel to the wall surface to prevent the wind from being felt in the presence of a person.

On the other hand, when step S1 is lower than the room temperature set temperature, the indoor temperature is still low, and ΔT is obtained from the temperature rise value Tset per unit time stored in step S3.
If f is large, the floor surface temperature is not stable and the temperature is rising. Therefore, the wind direction plate 6 is set to the state shown in FIG. 2 (a), and the airflow is directed to the center of the floor surface like the air flow 10 shown in FIG. , Contribute to the rise in floor temperature. Thus, in step S1 of FIG.
The circulation of ~ S6 is repeated, and when the floor surface temperature is low, warm air is sent to the center of the floor surface, and when the floor surface temperature rises, the warm air flows along the ceiling surface and the wall surface, and the heating that surrounds the room provides a feeling of airflow. A comfortable heating environment can be obtained.

[0019]

As described above, according to the present invention, the accuracy of the radiation sensor for detecting the floor surface temperature currently has a variation of ± 10 ° C. or more, and even if the floor surface temperature itself is measured, the accuracy is poor. On the other hand, there is no choice but to increase the accuracy by increasing the number of guarantee circuits and multiple radiation sensors.
By detecting whether the floor surface temperature is stable, that is, the temperature is high, by the stored temperature gradient per unit time, it is possible to inexpensively and accurately detect the floor surface temperature. As a result, when the floor surface temperature is high, it is possible to heat the human body without feeling the airflow, and when the floor surface temperature is low, it is possible to heat the floor surface center, and a comfortable heating environment is created.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram according to an embodiment of the invention.

FIG. 2 is a partial sectional view of a wind direction plate shape.

FIG. 3 is a virtual view of the air flow at the position of the wind direction plate in FIG.

FIG. 4 is a flowchart of wind direction control means.

FIG. 5 is an enlarged view of the floor temperature detector opening formed on the decorative cover of the indoor unit.

FIG. 6 is an enlarged view of the floor temperature detector opening formed on the decorative cover of the indoor unit.

FIG. 7 is a partial cross-sectional view of the floor temperature detector opening.

FIG. 8 is a front view of a conventional example.

FIG. 9 is a sectional view of a conventional example.

FIG. 10 is a partially cutaway view of a conventional example.

11 is a cross-sectional view taken along the line X-X ′ of FIG.

FIG. 12 is a state diagram of a blowing air of a conventional example.

FIG. 13 is an explanatory view showing the flow of blowout air in a conventional example.

FIG. 14 is an explanatory diagram showing a flow of blowout air in a conventional example.

FIG. 15 is a flowchart of a wind direction control means of a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cosmetic cover, 2 ... Heat exchanger, 3 ... Blower, 4 ... Air inlet, 5 ... Air outlet, 6 ... Wind direction plate, 7 ... Floor surface detector, 8
... wind direction plate control means, 9 ... wind direction plate driving motor, 10 ... air flow, 11 ... air flow, 12 ... air flow, ΔT
f ... Temperature rise value per unit time, ΔTset ... Temperature rise value per unit time stored in memory

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinya Yoshinaga 800 Tomita, Ohira-cho, Shimotsuka-gun, Tochigi Stock company Hitachi Co., Ltd. Tochigi factory (72) Inventor Minoru Kobayashi 800 Tomita, Ohira-machi, Shimotsuka-gun, Tochigi Ceremony company Hitachi Tochigi factory

Claims (1)

[Claims] 1. An indoor unit body in which a blower and a heat exchanger are housed, a suction port formed in the indoor unit body, a warm air which is sucked from the suction port by the blower and heat-exchanged by the heat exchanger. When the floor surface temperature is low, air is made to flow to the center of the floor surface to warm the floor surface, and when the floor surface temperature rises, the air is blown in parallel to the ceiling surface and the wall surface.
In an air conditioner that reduces the feeling of air flow in the human body, a detection signal is obtained from a floor surface temperature detector that detects the temperature of the floor surface, and the degree of temperature rise per unit time is monitored. If the temperature rise value is above the set value, air will flow to the center of the floor surface, and if the temperature upper value per unit time is below the set value, the air flow control board will control the discharge air flow direction so that the air will flow parallel to the ceiling and wall surfaces. An air conditioner comprising control means.